SIRT3 and delirium: Overexpression of circRNA_34414, or knockdown of miR‐6960‐5p, or overexpression of SIRT3 in hippocampal CA1 glutamatergic neurons significantly upregulated hippocampal SIRT3 expression, increased mitochondrial membrane potential levels, and significantly ameliorated postoperative delirium in aged mice; CircRNA_34414 ameliorates postoperative delirium in mice, possibly by targeting miR‐6960‐5p to upregulate SIRT3.